Questions

Consider a planet whose mass and radius are both twice the mass and radius of Earth. The acceleration due to gravity on the surface of the planet is 'n' times that on Earth. The value of n is:

Ring of Fire is found commonly in_________

With the participation in the Rio Olympics who has become the first tennis player in the world to have 7 appearances in Olympics?

Deficiency of which vitamin causes night blindness?

Which of the following is present in the centre of a flower?

The tendon is made up of

The hardest natural substance is

One of the techniques used for desalination of sea water is